描述 Description

The M52390FP is a semiconductor integrated circuit that has a function for converting R, G and B signals into NTSC/PAL composite video signals, as well as a superimpose function, on a single chip.

特性 Features

? RGB encoder-related

- Built-in LPF for color discrimination. An external resistor enables cutoff frequency control.

- An internal VCA circuit enables gain control of the chroma unit.

- A high-precision modulation circuit and clamping circuit realize low carrier leaks.

- Burst and synch signals are generated in the IC.

? Superimpose-related

- YS IN (control input) enables switching between two input signals, VIDEO IN and RGB IN.

- An internal high-speed analog switch makes it possible to insert fine text.

- An internal APC circuit automatically adjusts the color phases of new screen (VIDEO IN) and RGB encoder signals.

? Overall

-? The VIDEO OUT signal is output at 2 VP-P, making it possible to configure a 75 ? drive circuit with a single transistor.

-? Both NTSC and PAL are supported.

Application

? TVs, VCRs, monitors and other audio/video devices